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Voice of Music Amp - VM 160

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  • #31
    Part question- part suggestion: Looking at your first post, I notice the chassis of the amp doesn't sit all the way back or flush with the rear of the cabinet. I'm attaching a picture to show the area I'm talking about. See the red dot. If you cut that board under the chasssis to allow the whole chassis to go back a bit so the face plate meets the rear of the cabinet, would that give you enough room for your new speaker? I obviously can't know without measuring, but it could be an option if it will work.

    Click image for larger version

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    In other words, cut off that piece of wood on this line so that the chassis is further away from the speaker. Maybe that gets you enough room?

    Click image for larger version

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    Last edited by The Dude; 03-10-2020, 03:30 AM.
    "Yeah, well, you know, that's just, like, your opinion, man."

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    • #32
      Or get one of those plug in solid state rectifiers, they are short. If all that is in the way is the recto tube...
      Education is what you're left with after you have forgotten what you have learned.

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      • #33
        And maybe find a way to touch up the paint loss (from cleaning?) of the VM logo
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

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        • #34
          Originally posted by Enzo View Post
          Or get one of those plug in solid state rectifiers, they are short. If all that is in the way is the recto tube...
          Might also raise the B+ a bit and you may like the amp better. A couple of diodes soldered under the socket would be cheaper.

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          • #35
            Originally posted by Chuck H View Post
            So you live and learn.

            Glad you like the circuit changes.
            I learned that the old speaker sounds pretty damn good! And yes I do like the circuit change. Thanks for taking the time to provide a revised schematic!

            I had a friend over today and I recorded him playing through the VM. He was loving the tone. Here are some clips.
            Attached Files

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            • #36
              Here's Tom playing the VM 160. I really like this amp. A total score!
              Attached Files

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              • #37
                Yep. That's what I remember about my VOM build. It's remarkable how much audible LF and HF in the "right" ranges for guitar just leap out considering what a small OT it seems to be for the wattage. Like a bell chiming while you have a little water undulating in your ears I've considered sending my VOM OT to a magnetics shop to have it torn down and reverse engineered! I still have it, so there's time to decide. Sounds great.

                EDIT: Just to add... The OD/clipping tone on my build was very good as well. Thick and middy with a hint of that shiny top end and the nice low end but never farty or harsh. But that's running at the stock PT voltage which is only about 300Vp on the 6V6 tubes. Just a really great combination, that OT with a pair of 6V6's at the lower voltage. It really knocked my socks off.
                Last edited by Chuck H; 03-11-2020, 06:03 AM.
                "Take two placebos, works twice as well." Enzo

                "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

                "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

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